LAUSR

In this paper, a four-party scheme is presented for remotely sharing a single-qubit operation with the help of LOCC and the generalized seven-qubit Brown state |B7〉. Besides, we consider a theoretical scheme for four-party QOS by using the generalized (2N + 1)-qubit Brown state |B2N+1〉(N ≥ 2) proposed by Muralidharan and Panigrahi (Phys. Rev. A 77 (2008) 032321). Furthermore, some concrete discussions are made to study its important features, including the scheme determinacy, the sharer symmetry, the scheme security, the nowaday’s experimental feasibility as well as the intrinsic efficiency.